strip forbidden characters from the sql query

Author: adokitkat

src/forum.nim

@@ -1607,7 +1607,8 @@ routes:
 
   get "/search.json":
     cond "q" in request.params
-    let q = @"q"
+    let forbiddenSymbols = @[("(", ""), (")", "")]
+    let q = @"q".multiReplace(forbiddenSymbols)
     cond q.len > 0
 
     var results: seq[SearchResult] = @[]